摘要
探讨了改进后的碘量法测定硫化钠时,称样量、沉淀剂用量及酸碱度等因素对分析结果的影响,并通过试验确定了最佳测定条件。试验表明,用改进后的方法与国标法测定试样进行比较,分析结果相符,精密度(n=7)小于或等于1.1%。同一批次样品,分离硫化钠后溶液中亚硫酸钠消耗碘标准滴定溶液的体积V3不变,可作为定值计算,方法简单,达到快速分析的目的。
The factors influencing the analysis results by improved iodimetry for determination of sodium sulphide content , including sample weight, precipitant weight and pH value, are discussed. The optimum experimental conditions were determined by experiment. The test showed that the results by improved iodimetry were consistent with those by the national method with 1.1% or less of precision （n = 7）. For the same batch of samples, V3, the volume of the standard iodine solution consumed by solution of sodium sulfite after the separation of sodium sulphide could be calculated as a fixed value. The improved method led to a simple and rapid analysis.
出处
《硫酸工业》
CAS
2013年第6期38-41,共4页
Sulphuric Acid Industry
关键词
硫化钠
测定
快速分析
碘量法
改进
sodium sulphide
content
rapid analysis
iodimetry
improvement
